CN101722588A - drying hopper - Google Patents
drying hopper Download PDFInfo
- Publication number
- CN101722588A CN101722588A CN200910207972A CN200910207972A CN101722588A CN 101722588 A CN101722588 A CN 101722588A CN 200910207972 A CN200910207972 A CN 200910207972A CN 200910207972 A CN200910207972 A CN 200910207972A CN 101722588 A CN101722588 A CN 101722588A
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- China
- Prior art keywords
- loading hopper
- dry air
- dispersion
- materials
- hopper portion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
- F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A drying hopper (1) comprises a tube-shaped hopper main body (2) having a material charging port (3) at a top portion thereof and a material discharging port (4) at a bottom portion thereof. A first hopper part (5), a second hopper part (6) and a third hopper part (7) are arranged in this order at intervals from top to bottom within the hopper main body (2), with each being formed substantially in the shape of an inverted cone, and through which dry air is capable of being ventilated, and granular resin materials (P) are capable of being passed. First to third material dispersion elements (8, 9, 10) for dispersing the granular resin materials (P) are each disposed under the material charging port (3), and above the top surface of the respective first to third hopper parts (5, 6, 7). A dry air supply/discharge system (11, 12) forms a dry air ventilation path running from the bottom portion of the hopper main body (2) to above the first material dispersion element (8) through the third hopper part (7), the second hopper part (6), and the first hopper part (5), and leads to the outside of the hopper main body (2).
Description
Technical field
The present invention relates to a kind of drying hopper, relate in particular to the drying hopper that uses when the resin material that uses in the injection moulding machine etc. carried out removal moisture drying.
Background technology
All the time, the resin material that uses in the injection moulding machine etc. is before injection moulding machine etc. is supplied with, and after this removal moisture drying in drying hopper sends into above-mentioned resin material injection moulding machine etc. for injection mo(u)lding.
With reference to accompanying drawing 3 schematic configuration that relates to conventional example in this kind drying hopper is described.
Comprise with the drying hopper shown in the figure 30: loading hopper body 33, this loading hopper body 33 has tower shape (the cylindric or quadrangular barrel shape) structure of material discharge mouth 32 for material input port 31, bottom are arranged at top; Dispersion of materials body 34, this dispersion of materials body 34 is configured in the inside of above-mentioned loading hopper body 33, the epigranular resin material P of for example polycarbonate resin that falls from material input port 31 is disperseed in loading hopper body 33, it is fallen to material discharge mouth 32, and dispersion of materials body 34 utilizes the mesh material of energy ventilating air to form cone-shaped (for example the rectangular pyramid body being bonded into octahedra shape up and down symmetrically); Dry air supply pipe 35, this dry type device supply pipe 35 is configured in the upper lateral part of loading hopper body 33 between the top of dispersion of materials body 34, and the dry air after will also heating from the low drying of the open-air temperature of not shown dehumidifying heat pump is sent in the dispersion of materials body 34; And dry air return port 36, this dry air return port 36 is arranged at the top of above-mentioned loading hopper body 33.
Be admitted to the mesh part of dry air by above-mentioned material dispersion 34 in the above-mentioned material dispersion 34, contact with the many resin material P that in loading hopper body 33, disperse and fall, after absorbing the moisture that contains among the resin material P when between resin material P, passing, return to not shown dehumidifying heat pump from above-mentioned dry air return port 36.
Above-mentioned existing drying hopper 30 forms in loading hopper body 33 by the dry air from 34 ejections of dispersion of materials body and absorbs the moisture of resin material P, and it is returned to dehumidifying heat pump from dry air return port 36.
But, because the time of contact between dry air and resin material P is short, can't make resin material P fully dry, to still remainingly there be the dry air former state of water absorbing capacity to discharge simultaneously, therefore, comprised to make resin material P drying once more, or can't bring into play the problems such as absorbability of dry air fully.
Proposed a kind of drying device in the patent documentation 1, this drying device comprises the loading hopper of being made by first cylindrical portion, frustum cylindrical portion and second cylindrical portion, and wherein, first cylindrical portion is a straight circular cylinder type, is positioned at top; The frustum cylindrical portion is connected setting with the below of first cylindrical portion, and the diameter of below diminishes gradually; Second cylindrical portion is a straight circular cylinder type, be connected setting with the below of frustum cylindrical portion, and the bottom forms turbination, and the turbination portion of loading hopper is provided with the warm-air supply pipe of supplying with hot blast, loading hopper is supplied with the first cold wind supply pipe of cold wind and the second cold wind supply pipe etc.
The drying device of above-mentioned patent documentation 1 also needs subsidiary members such as warm-air supply pipe, the first cold wind supply pipe and the second cold wind supply pipe except baroque loading hopper self, have complicated structure on the whole.
Patent documentation 1: the Japan Patent spy opens the 2001-294294 communique
Summary of the invention
Problem to be solved by this invention is not have such drying hopper: realizing effectively utilizing the absorbability of dry air to improve drying efficiency when the loading hopper self structure is simplified, and can shorten the drying time of resin material.
The topmost feature of drying hopper of the present invention is to have: loading hopper body, this loading hopper body are that top has material input port, bottom that the tubular structure of material discharge mouth is arranged; By from top to bottom order devices spaced apart ground configuration and form approximate turbination respectively, dry air and can flow through the granular resin material can circulate in the inside of above-mentioned loading hopper body for multilayer loading hopper portion, this multilayer loading hopper portion; The multilayer material dispersion, this multilayer material dispersion is disposed at the upside of each multilayer loading hopper portion respectively below the above-mentioned material input port, make the granular resin dispersion of materials; And dry air is supplied with the discharge system, this dry air supply with discharge system form from the bottom of above-mentioned loading hopper body via multilayer loading hopper portion to the top of the dispersion of materials body of the superiors and with the circulation path of the dry air of the external communications of loading hopper body, contact with the convection current in a plurality of stages of dry air by the many granular resin materials that in above-mentioned loading hopper body, disperse and flow down, the moisture that contains in the granular resin material is removed in absorption, and it is discharged from the material discharge mouth.
According to technical scheme 1 described invention, contact with the longer convection current of the time of comparing with conventional example in a plurality of stages of dry air by the intrinsic many granular resin materials of loading hopper, can absorb the moisture that contains in many granular resin materials effectively and make it dry fully, it is discharged into the outside of drying hopper, and send into injection moulding machine etc. for injection mo(u)lding, the simplification of implementation structure can realize and provide a kind of high-performance drying hopper that helps shortening drying time as a whole.
According to technical scheme 2 described inventions, by the loading hopper portion of 3 layers of inverted cone shape of configuration in the loading hopper body, the simple structure of 3 layers of pyramidal dispersion of materials body, can realize and provide a kind of drying hopper that has same effect with technical scheme 1 described invention.
According to technical scheme 3 described inventions, with when technical scheme 2 described inventions have identical effect, also because it forms the air quantity that monitors dry air with air volume meter, monitor dew-point temperature with dew point instrument, when inappropriate, therefore give the alarm by alarm device, can realize and provide the drying hopper of suitableization of the qualitative control of the resin material that a kind of energy realization sends into injection moulding machine etc.
Description of drawings
Fig. 1 is the summary construction diagram of the drying hopper of the embodiment of the invention.
Fig. 2 is the schematic block diagram of control system of the drying hopper of the embodiment of the invention.
Fig. 3 is the summary construction diagram of existing drying hopper.
(symbol description)
1 drying hopper
2 loading hopper bodies
3 material input ports
4 material discharge mouths
5 first loading hopper portions
5a flows through a portion
6 second loading hopper portions
6a flows through a portion
The inboard conus portion of 6b
The 6c peripheral part
7 the 3rd loading hopper portions
The 7a peristome
The inboard conus portion of 7b
The 7c peripheral part
8 first dispersion of materials bodies
9 second dispersion of materials bodies
10 the 3rd dispersion of materials bodies
11 dry air supply pipes
12 dry air return ports
13 air volume meters
14 dew point instruments
15 filters
16 alarm devices
17 control parts
The P resin material
The specific embodiment
The objective of the invention is to realize and provide a kind of drying hopper, this drying hopper is realizing effectively utilizing the absorbability of dry air to improve drying efficiency when the loading hopper self structure is simplified, and can shorten the drying time of resin material.
Drying hopper of the present invention has: the loading hopper body, and it has the tubular structure of material discharge mouth for material input port, bottom are arranged at top; The first loading hopper portion, the second loading hopper portion and the 3rd loading hopper portion, its in above-mentioned loading hopper body interior by the configuration of from top to bottom order devices spaced apart ground and form approximate turbination respectively, the dry air that can circulate, and can flow through granular resin material; The first dispersion of materials body to the, three dispersion of materials bodies, it is disposed at three loading hopper portions of the first loading hopper portion to the respectively below the above-mentioned material input port upside makes the granular resin dispersion of materials; And dry air is supplied with the discharge system, its form from the bottom of above-mentioned loading hopper body via the 3rd loading hopper portion, the second loading hopper portion, the first loading hopper portion to the top of the first dispersion of materials body of the superiors and with the circulation path of the dry air of the external communications of loading hopper body, disperse and many granular resin materials of flowing down contact with the triphasic convection current of dry air through three stages by in above-mentioned loading hopper body, carrying out, the moisture that contains in the granular resin material is removed in absorption, and with it from material discharge mouth discharging, realize above-mentioned purpose by this.
Embodiment
Followingly the drying hopper of the embodiment of the invention is elaborated with reference to Fig. 1, Fig. 2.
As shown in Figure 1, the drying hopper 1 of present embodiment has: loading hopper body 2, and it has tower shape (for example cylindric) structure of material discharge mouth 4 for material input port 3, bottom are arranged at top; The first loading hopper portion 5, the second loading hopper portion 6, the 3rd loading hopper portion 7, its in the inside of above-mentioned loading hopper body 2 by from top to bottom order devices spaced apart ground configuration and form approximate turbination respectively.
The above-mentioned first loading hopper portion 5 says that on the whole the mesh material by the dry air that can circulate forms, and simultaneously is provided with the 5a of portion that flows through cylindraceous that polycarbonate resin equigranular resin material P for example flows through at the central portion of foot.
The above-mentioned second loading hopper portion 6 is connected setting by the obconic inboard conus portion 6b that formed by mesh material that can ventilating air and the peripheral part 6c that forms with light sheet in its outside and forms approximate turbination, and the central portion of while at foot is provided with the 6a of portion that flows through cylindraceous that resin material P flows through.
Above-mentioned the 3rd loading hopper portion 7 is connected setting by the obconic inboard conus portion 7b that formed by mesh material that can ventilating air and the peripheral part 7c that forms with light sheet in its outside and forms approximate turbination, and the while is provided with peristome 7a and makes it relative with above-mentioned material floss hole 4 in the foot side.
In addition, press the order in the mesh zone of above-mentioned inboard conus portion 7b, inboard conus portion 6b, the first loading hopper portion 5, its size is set at the area that ventilates becomes big.
In the drying hopper 1 of present embodiment, below the material input port 3 of the inside of above-mentioned loading hopper body 2 and be the flowing through on the position of the upside of the 5a of portion of the first loading hopper portion 5, disposing profile is the first dispersion of materials body 8 of cone shape or pyramid shape (for example octahedra shape that the rectangular pyramid body is engaged up and down symmetrically), this first dispersion of materials body 8 disperses the granular resin material P that falls from material input port 3, and it is dropped to flow through a 5a of portion.
In addition, in the first loading hopper portion 5 and the position between the second loading hopper portion 6 of the inside of above-mentioned loading hopper 2, disposing profile is the second dispersion of materials body 9 of cone shape or pyramid shape (for example octahedra shape that the rectangular pyramid body is engaged up and down symmetrically), this second dispersion of materials body 9 disperses the granular resin material P that falls, and it is dropped to flow through a 6a of portion.
And, in the second loading hopper portion 6 and the position between the 3rd loading hopper portion 7 of the inside of above-mentioned loading hopper 2, disposing profile is the 3rd dispersion of materials body 10 of cone shape or pyramid shape (for example approximate hexagonal pyramid body shape), the 3rd dispersion of materials body 10 disperses the granular resin material P that falls, and makes it drop to above-mentioned material floss hole 4 via above-mentioned peristome 7a.
And, in the drying hopper 1 of present embodiment, be provided with dry air supply pipe 11 in the following side of above-mentioned loading hopper body 2, be provided with dry air return port 12 in the upper end of above-mentioned loading hopper body 2.
Be connected with the air volume meter 13 of measuring the dry air air quantity, the dew point instrument 14 of measuring dew-point temperature (temperature that the water that contains in the air occurs with liquid form) on the above-mentioned dry air supply pipe 11.
The part of above-mentioned dry air return port 12 disposes the filter 15 that powder of making in the dry air etc. adheres to.
Above-mentioned dry air supply pipe 11 and not shown generation-30 ℃ are connected to the ejection side of the dehumidifying heat pump of about-45 ℃ dry air (dehumidified air), and above-mentioned dry air return port 12 is connected with the suction side of dehumidifying heat pump, forms to make the dry air circulation.
Fig. 2 is the figure of control system of the drying hopper 1 of expression present embodiment, and above-mentioned control system comprises: control part 17, and it obtains the air quantity of the dry air of being measured by above-mentioned air volume meter 13, with the data of the dew-point temperature of above-mentioned dew point instrument 14 mensuration; And alarm device 16, it is connected with above-mentioned control part 17 and sounds a buzzer, above-mentioned control system forms by the data of 17 pairs of air quantity of control part, dew-point temperature and predefined suitable airflow value, suitably the data of dew point temperature value compare judgement, drives alarm device 16 and give the alarm when inappropriate.
Then, effect, the effect to the drying hopper 1 of present embodiment describes.
In the drying hopper 1 of present embodiment, from material input port 3 be put in the loading hopper body 2 many granular resin material P by the first dispersion of materials body 8 along circumference or to around disperse and arrive the first loading hopper portion 5, slide along its inclined-plane, flow through then and above-mentionedly flow through a 5a of portion, drop on the second dispersion of materials body 9.
Then, granular resin material P by the second dispersion of materials body 9 along circumference or to around disperse and arrive the second loading hopper portion 6, slide along its inclined-plane, flow through an above-mentioned 6a of portion that flows through then, drop on the 3rd dispersion of materials body 10.
Then, granular resin material P, slides along its inclined-plane along circumference or to being disperseed all around and arriving the 3rd loading hopper portion 7 by the 3rd dispersion of materials body 10, arrives material discharge mouth 4 via above-mentioned peristome 7a, to the outside drain of drying hopper 1.
On the other hand, dry air from dehumidifying heat pump flow in the loading hopper body 2 from dry air supply pipe 11, the inboard conus portion 7b that is formed by the mesh material by the 3rd loading hopper portion 7 also rises, then the inboard conus portion 6b that is formed by the mesh material by the second loading hopper portion 6 also rises, by the mesh part and the rising of the first loading hopper portion 5, arrive dry air return ports 12 and return dehumidifying heat pump then via above-mentioned filter 15.
Contact through the longer convection current of the time of comparing with conventional example that adds up to three phases with dry air by the many granular resin material P in the loading hopper body 2 in the drying hopper 1 of above-mentioned present embodiment, can absorb the moisture that contains among many granular resin material P effectively and make it fully dry, it is discharged into the outside of drying hopper 1, just can sends into injection moulding machine etc. for injection mo(u)lding.
That is, according to the drying hopper 1 of present embodiment, with existing drying hopper mutually specific energy bring into play the water absorbing capacity of dry air fully, in general, can make resin material P fully dry at short notice.
In addition, drying hopper 1 according to present embodiment, owing to form the air quantity that monitors dry air with above-mentioned air volume meter 13, monitor dew-point temperature with above-mentioned dew point instrument 14, therefore when inappropriate, give the alarm, can realize sending into suitableization of qualitative control of the resin material P of injection moulding machine etc. by alarm device 16.
And, according to the drying hopper 1 of present embodiment, also can be filtered device 15 attractions and remove because above-mentioned resin material P contact the micro powder that is produced with the convection current of dry air, so can realize the quality-improving of resin material P.
In addition, in the drying hopper 1 of present embodiment, when the serviceability temperature drying that to be 120 ℃, dew-point temperature carry out resin material P for-40 ℃ dry air is handled, use karl Fischer (Karl-Fisher) moisture meter that resin material P is carried out the result that determination of moisture obtains to be: be 1835ppm before dry, is 294ppm afterwards through 1 hour drying.
In the drying hopper 1 of present embodiment, the structure of loading hopper portion, dispersion of materials body also can be implemented two layers structure, four layers structure etc. except above-mentioned three layers structure.
The present invention is except being applied to polycarbonate resin material, and the drying that can also be widely used in various granular resin materials is handled.
Claims (3)
1. drying hopper is characterized in that having:
Loading hopper body, this loading hopper body are that top has material input port, bottom that the tubular structure of material discharge mouth is arranged;
By from top to bottom order devices spaced apart ground configuration and form approximate turbination respectively, dry air and can flow through the granular resin material can circulate in the inside of described loading hopper body for multilayer loading hopper portion, this multilayer loading hopper portion;
Multilayer material dispersion, this multilayer material dispersion are disposed at the upside of each multilayer loading hopper portion respectively below described material input port, make the granular resin dispersion of materials; And
Dry air is supplied with the discharge system, this dry air supply with discharge system form from the bottom of described loading hopper body via multilayer loading hopper portion to the top of the dispersion of materials body of the superiors and with the circulation path of the dry air of the external communications of loading hopper body,
By contacting with the convection current in a plurality of stages of dry air, absorb and remove the moisture that contains in the granular resin material, and it is discharged from the material discharge mouth in the intrinsic dispersion of described loading hopper and many granular resin materials of flowing down.
2. drying hopper is characterized in that having:
Loading hopper body, this loading hopper body are that top has material input port, bottom that the tubular structure of material discharge mouth is arranged;
The first loading hopper portion, the second loading hopper portion and the 3rd loading hopper portion, by from top to bottom order devices spaced apart ground configuration and form approximate turbination respectively, dry air and can flow through the granular resin material can circulate in the inside of described loading hopper body for this first loading hopper portion, the second loading hopper portion and the 3rd loading hopper portion;
The first dispersion of materials body to the, three dispersion of materials bodies, these first dispersion of materials body to the, three dispersion of materials bodies are disposed at the upside of three loading hopper portions of the first loading hopper portion to the respectively below described material input port, make the granular resin dispersion of materials; And
Dry air is supplied with the discharge system, this dry air supply with discharge system form from the bottom of described loading hopper body via the 3rd loading hopper portion, the second loading hopper portion, the first loading hopper portion to the top of the first dispersion of materials body of the superiors and with the circulation path of the dry air of the external communications of loading hopper body
By disperseing and many granular resin materials of flowing down contact with the convection current of the three phases of dry air through three phases in that described loading hopper is intrinsic, the moisture that contains in the granular resin material is removed in absorption, and it is discharged from the material discharge mouth.
3. drying hopper is characterized in that having:
Loading hopper body, this loading hopper body are that top has material input port, bottom that the tubular structure of material discharge mouth is arranged;
The first loading hopper portion, the second loading hopper portion and the 3rd loading hopper portion, by from top to bottom order devices spaced apart ground configuration and form approximate turbination respectively, dry air and can flow through the granular resin material can circulate in the inside of described loading hopper body for this first loading hopper portion, the second loading hopper portion and the 3rd loading hopper portion;
The first dispersion of materials body to the, three dispersion of materials bodies, these first dispersion of materials body to the, three dispersion of materials bodies are disposed at the upside of three loading hopper portions of the first loading hopper portion to the respectively below described material input port, make the granular resin dispersion of materials; And
Dry air is supplied with the discharge system, this dry air supply with discharge system form from the bottom of described loading hopper body via the 3rd loading hopper portion, the second loading hopper portion, the first loading hopper portion to the top of the first dispersion of materials body of the superiors and with the circulation path of the dry air of the external communications of loading hopper body;
Air volume meter and dew point instrument, described air volume meter is measured the air quantity of the dry air of supplying with to described loading hopper body, and described dew point instrument is measured dew-point temperature; And
Control part, this control part drives alarm device at the flow of dry air, when dew-point temperature is inappropriate and gives the alarm,
By disperseing and many granular resin materials of flowing down contact with the convection current of the three phases of dry air through three phases in that described loading hopper is intrinsic, the moisture that contains in the granular resin material is removed in absorption, and it is discharged from the material discharge mouth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-278905 | 2008-10-29 | ||
| JP2008278905A JP2010105254A (en) | 2008-10-29 | 2008-10-29 | Drying hopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101722588A true CN101722588A (en) | 2010-06-09 |
Family
ID=41591635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910207972A Pending CN101722588A (en) | 2008-10-29 | 2009-10-28 | drying hopper |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100107434A1 (en) |
| EP (1) | EP2182314A2 (en) |
| JP (1) | JP2010105254A (en) |
| KR (1) | KR20100047798A (en) |
| CN (1) | CN101722588A (en) |
| TW (1) | TW201026469A (en) |
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| US7220365B2 (en) * | 2001-08-13 | 2007-05-22 | New Qu Energy Ltd. | Devices using a medium having a high heat transfer rate |
| US8865101B2 (en) * | 2006-08-25 | 2014-10-21 | Robert A. Rossi | Process and system for producing commercial quality carbon dioxide from high solids lime mud |
| JP4927497B2 (en) * | 2006-10-25 | 2012-05-09 | 株式会社シスコ | Moisture-free hopper equipment |
| US20090208402A1 (en) * | 2008-02-20 | 2009-08-20 | Rossi Robert A | Process and system for producing commercial quality carbon dioxide from fine particle limestone |
| US8808529B2 (en) * | 2009-02-17 | 2014-08-19 | Mcalister Technologies, Llc | Systems and methods for sustainable economic development through integrated full spectrum production of renewable material resources using solar thermal |
-
2008
- 2008-10-29 JP JP2008278905A patent/JP2010105254A/en active Pending
-
2009
- 2009-10-19 KR KR1020090099279A patent/KR20100047798A/en not_active Application Discontinuation
- 2009-10-27 EP EP09174145A patent/EP2182314A2/en not_active Withdrawn
- 2009-10-28 TW TW098136435A patent/TW201026469A/en unknown
- 2009-10-28 CN CN200910207972A patent/CN101722588A/en active Pending
- 2009-10-29 US US12/608,420 patent/US20100107434A1/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974523A (en) * | 2020-08-04 | 2020-11-24 | 吉林亚泰水泥有限公司 | Shaping and screening system applied to recycled aggregate |
| CN112595033A (en) * | 2020-12-10 | 2021-04-02 | 万华化学集团股份有限公司 | Preparation method of polycarbonate powder with stable color |
| CN112595033B (en) * | 2020-12-10 | 2022-11-08 | 万华化学集团股份有限公司 | Preparation method of polycarbonate powder with stable color |
| CN114383406A (en) * | 2022-01-17 | 2022-04-22 | 杭州姚生记食品有限公司 | Dynamic circulation drying device and method for hickory nut |
| CN114476685A (en) * | 2022-03-02 | 2022-05-13 | 安徽合力股份有限公司合肥铸锻厂 | Multi-point material-sending conveying system for lost foam copolymer |
| CN114476685B (en) * | 2022-03-02 | 2024-05-17 | 安徽合力股份有限公司合肥铸锻厂 | Lost foam copolymer multipoint feeding and conveying system |
| CN114347304A (en) * | 2022-03-21 | 2022-04-15 | 山东永创材料科技有限公司 | Resin production dewatering device |
| CN114347304B (en) * | 2022-03-21 | 2022-05-13 | 山东永创材料科技有限公司 | Resin production dewatering device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201026469A (en) | 2010-07-16 |
| JP2010105254A (en) | 2010-05-13 |
| US20100107434A1 (en) | 2010-05-06 |
| EP2182314A2 (en) | 2010-05-05 |
| KR20100047798A (en) | 2010-05-10 |
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Open date: 20100609 |